Influence of MWCNTs Doping on the Structure and Properties of PEDOT:PSS Films

Li, Jiao; Liu, Juncheng; Gao, Congjie; Jin-ling, Zhang; Sun, Hanbin

doi:10.1155/2009/650509

Cited by 45 publications

(38 citation statements)

References 45 publications

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“…The two characteristic peaks at 1558 and at 1313 cm −1 in MWCNT represent a graphite E 2g (G) mode and disordered A 1g (D) mode, respectively. In the Raman spectra of composite films, shift of Raman peaks corresponding to D mode (from 1313 to 1319 cm −1 ) and G mode (from 1558 to 1566 cm −1 ) indicates the interaction of MWCNT with the PEDOT which is also responsible for conductivity enhancement …”

Section: Resultsmentioning

confidence: 99%

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Jasna

Raman

Jayalekshmi

et al. 2018

Phys. Status Solidi A

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High‐performance flexible optoelectronic devices have great potential as active elements for flexible and wearable electronics. The authors report highly flexible conducting poly (3, 4‐ethylene dioxythiophene):polystyrene sulfonate/multiwalled carbon nanotubes (PEDOT:PSS/MWCNT) composite thin films synthesized by simple, cost effective rod‐coating technique. The effect of MWCNT on PEDOT:PSS matrix is analyzed by spin coating PEDOT:PSS/MWCNT composite on glass substrates with varying concentration (0–2 wt%) of MWCNT. Field emission scanning electron microscope (FE‐SEM) images confirm the uniform dispersion of MWCNT and formation of conducting path above 0.3 wt% of MWCNT. The conductivity of the spin coated films is increased from 1 Scm−1 to ≈20 Scm−1 on addition of 2 wt% of MWCNT. From UV‐Vis NIR spectra, the transparency of composite films in the visible range (at 550 nm) is found to decrease with respect to MWCNT loading. The PEDOT:PSS/MWCNT flexible electrode exhibit high electrical conductivity of 74 Scm−1 and high stability upon bending to a radius of curvature ≈9.6 mm. The features observed are an outcome of the interaction of MWCNT with PEDOT polymer as the back bone. These films are adhered to the substrate and the properties are stable upon bending the film for large number of cycles. To demonstrate the potential use of this composite film as an electrode, a thin film transistor is fabricated with PEDOT:PSS/MWCNT film as source and drain electrode. The device shows high field effect mobility of µsat = 1.16 cm2 V−1 s−1 with on/off ratio about 2.3 × 103. These favorable results make PEDOT:PSS/MWCNT conducting electrode as an excellent candidate for the next generation flexible electrodes realized by a facile solution process.

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Section: Resultsmentioning

confidence: 99%

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Jasna

Raman

Jayalekshmi

et al. 2018

Phys. Status Solidi A

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“…The simple approach used by us in order to provide stable dispersions of carbon nanotubes, is to mix by ultrasonic treatment the pristine CNTs, and a conjugated polymer (PEDOT) doped with a water-soluble polyelectrolyte (PSS). MWCNTs are wrapped by PEDOT:PSS, forming suspensions with long term stability that likely is ensured by the noncovalent interactions between the delocalized π bond network of carbon nanotubes and the thiophene rings of PEDOT backbone [16]. …”

Section: Methodsmentioning

confidence: 99%

Electrical Characterization and Hydrogen Peroxide Sensing Properties of Gold/Nafion:Polypyrrole/MWCNTs Electrochemical Devices

Scandurra

Arena

Ciofi

et al. 2013

Sensors

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Electrochemical devices using as substrates copier grade transparency sheets are developed by using ion conducting Nafion: polypyrrole mixtures, deposited between gold bottom electrodes and upper electrodes based on Multi Walled Carbon Nanotubes (MWCNTs). The electrical properties of the Nafion:polypyrrole blends and of the gold/Nafion:polypyrrole/MWCNTs devices are investigated under dry conditions and in deionized water by means of frequency dependent impedance measurements and time domain electrical characterization. According to current-voltage measurements carried out in deionized water, the steady state current forms cycles characterized by redox peaks, the intensity and position of which reversibly change in response to H2O2, with a lower detection limit in the micromolar range. The sensitivity that is obtained is comparable with that of other electrochemical sensors that however, unlike our devices, require supporting electrolytes.

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“…The addition of EG and MWCNT increases the conductivity of PEDOT:SS. This is attributed to the structural changes caused by EG and the formation of continuous networks by MWCNT [4,6]. The conductivity of pristine PEDOT:PSS is ~15 S/cm which increased to ~437 S/cm with the addition of EG and MWCNT.…”

Section: B Work Function Measurementsmentioning

confidence: 98%

“…MWCNT networks can be seen embedded in the polymer in Fig 1b. Hence an increased surface roughness is obtained after addition of EG and PEDOT:PSS. Such morphology helps in better charge transfer through the MWCNT conductive networks [6], and leads to improved interfacial adhesion between HEL and P3HT:PCBM.…”

Section: A Morphology Studiesmentioning

confidence: 99%

Improving P3HT:PCBM based polymer solar cell: Role of doped PEDOT:PSS hole extracting layer towards degradation

Arora

Singh

Arora

et al. 2014

2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)

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Films of PEDOT:PSS and doped PEDOT:PSS, used as hole extracting layer in organic solar cells, have been studied using scanning electron microscopy, Kelvin probe work function measurement, Col-Cole plots, and conductivity measurements and current voltage (I-V) characteristics with time. A change in morphology is observed in PEDOT:PSS films doped with ethylene glycol and multi-walled carbon nanotubes. The doped films have rougher morphology as compared to the pristine films. The work function increases for doped sample thus improving the charge transfer. Further, the analyses of Cole-Cole plots show that the resistance of doped film is lower than pristine film. The change in conductivity with time has been measured, and the I-V characteristics of fresh and degraded samples indicates that fall in conductivity of HEL is one of the reasons for the decrease in device performance.

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Influence of MWCNTs Doping on the Structure and Properties of PEDOT:PSS Films

Cited by 45 publications

References 45 publications

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Electrical Characterization and Hydrogen Peroxide Sensing Properties of Gold/Nafion:Polypyrrole/MWCNTs Electrochemical Devices

Improving P3HT:PCBM based polymer solar cell: Role of doped PEDOT:PSS hole extracting layer towards degradation

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